He only shows frametimes for i7 and i5 though,on the i3/g4560 you will get stutters due to the game itself so the choice in gpu is irrelevant,or at least it won't be made clear by people in a forum since it's pretty difficult to tell whether a stutter comes form the CPU the GPU the HDD and so on, you will need someone who can make sure the games will run smooth and has access to GPUs from both vendors so he can then run tests on the otherwise same system to see what's what.